Raman spectra of borax, kernite and colemanite

Abstract

The Raman spectra of borax, (Na₂B₄O₇·10H₂O), kernite (Na₂B₄O₇·4H₂O) and colemanite (Ca₂B₆O₁₁·5H₂O) have been investigated using λ 2536·5 as exciting radiation. The spectrum of colemanite is reported for the first time. Many additional lines hitherto unreported have been found in the case of kernite and borax. The spectrum of borax exhibits seven lines, besides four bands due to water of crystallisation while the spectrum of kernite is found to consist of twenty-eight lines and six water bands. Colemanite exhibits nineteen Raman lines, and three bands due to water of crystallization. The observed spectra are discussed in relation to the known structures of the substances.